Polyurethane pressure-sensitive adhesives

Details Polyurethane pressure-sensitive adhesives Polyurethane pressure-sensitive adhesives

C - Chemistry, Metallurgy

09

J

C09J 175/04 (2006.01) A61L 15/26 (2006.01) A61L 15/58 (2006.01) A61L 31/06 (2006.01) A61L 31/14 (2006.01)

Patent

CA 2108734

Pressure-sensitive adhesives which possess absorptivity and/or permeability properties to remove transepidermal wager loss and/or other bodily fluids that come into contact with the adhesive, in combination with a fine balance of cohesion and adhesion properties, can be formulated by controlling the crosslinking of a polyurethane polymer having excess hydroxyl functionality, a glass transition temperature of less than about 0°C, a moisture absorption of at least about 20% of its weight and/or a moisture vapor transmission rate of at least about 300 grams/meter2/24 hours measured at 37°C and a 90% relative humidity gradient. Adhesives of these polymers possess a peel adhesion to human skin of between about 0.3 and 4 newtons/cm width of the polymer or adhesive.

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